Effective magnetostriction and magnetomechanical coupling of terfenol-D composites
Effective magnetostriction and magnetomechanical coupling of terfenol-D composites
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DOI：
10.1063/1.1377046
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发表时间：
2001-05
影响因子：
4
通讯作者：
Zhi-jun Guo;S. Busbridge;A. Piercy;Zhidong Zhang;Xinguo Zhao;B. Wang
中科院分区：
文献类型：
--
作者：
Zhi-jun Guo;S. Busbridge;A. Piercy;Zhidong Zhang;Xinguo Zhao;B. Wang
Epoxy and glass matrix Terfenol-D composites have been produced by using a cold and hot compression-molding technique, respectively. The static and dynamic magnetic and magnetomechanical properties of samples with a volume fraction V-f in the range of 10% to 82% have been investigated as functions of bias field, frequency, and ac drive field. The epoxy composites have a greater saturation magnetostrain than the glass composite with the same V-f. The elastic modulus of the epoxy composites is dominated by that of the matrix, E-m. Increasing the value of E-m reduces the measured magnetostriction lambda (c) of the composites. A model, based on the strain related energy equilibrium, has been developed to describe the experimental results for V-f and E-m dependences of lambda (c) and the magnetomechanical coupling coefficient k(33). It is concluded that an optimum k(33) value can be obtained by choosing a matrix with an appropriate elastic modulus. (C) 2001 American Institute of Physics.
